How Does One Paint Isometry?

The usual drawing order is
1
2 3
4 5 6
7 8
9

But then tile 5 will overlap sprite moving between cells 2 and 3

And you can't draw underlying tiles before the sprites, otherwise large sprites would mess the higher level tiles. Typical tile cubes in games like X-Com and Magic & Mayhem are 32x32x16 (allows modelling nice curved terrain), while sprites are several times higher to maintain proportions

>>13
You've totally failed. How do you determine drawing order of roof, so that 10 won't overlap some sprite standing on cube 6 or 7? And some sprite placed in a corner between 3 cubes would be overlapped by 7 cubes. Moreover, you haven't noticed that there are wall cubes behind the sprite - just above 4 and 5, but below roof cubes. What would be their drawing order? If we draw them after the sprite, they will overlap it.